“The public has a right to every man’s evidence.”
If a party tries to abuse the discovery process against a third party then the third party can move for sanctions, including costs.
If a party tries to abuse the discovery process against a third party then the third party can move for sanctions, including costs.
Yes, there's definitely remedies if things go too far. Good luck with those, though. But the point is that you don't have to be the plaintiff or the respondent to get tied up in an expensive, time-consuming process.